fix a facebook loginand sign in bug

When a user try to register via facebook or log in via facebook there is a message error on our website. The error message is " you must allow the usage of your app to be able to login with your facebook account"

3 freelancers are bidding on average €46 for this job

Will do it in €60 as per the bug specified related to facebook api.
I have 7 year of experience in Qt, , oracle , sqlite, php ,Joomla, magento, API integration, python , mysql, C, c++ for radar display project.I am woMore